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induction-coil resistance

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220009
EISBN: 978-1-62708-341-6
... of methods for determination of power requirements for a given application. eddy-current distribution induction heating induction-coil resistance power requirements An induction heating system consists of a source of alternating current (ac), an induction coil, and the workpiece to be heated...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050009
EISBN: 978-1-62708-311-9
.... Induction heating occurs when a strong electromagnetic force field is produced from an induction coil close enough to a part to produce an electric current in the part. The part is heated mainly due to the resistance of the flow of this electric current. The actual heating is a complex function related...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220027
EISBN: 978-1-62708-341-6
... circuit is in the induction coil, its resistance should be kept low, thus ensuring maximum efficiency. True, Reactive, and Apparent Power The definitions of reactance and impedance allow several other important quantities in induction heating to be defined. These are the true, reactive...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050317
EISBN: 978-1-62708-311-9
... will dictate how much the copper heats due to the resistance of the high-frequency current. Reference depth and the depth of heating are discussed in Chapter 2, “Theory of Heating by Induction,” in this Volume. Because the reference depth increases as frequency decreases, the most efficient ideal coil...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220185
EISBN: 978-1-62708-341-6
...) (a) Resistivity of copper assumed to be 1.67 × 10 −6 Ω·cm (0.66 × 10 −6 Ω·in.). (b) Tube ID requirements for adequate cooling-water flow should also be considered. Fig. 8.52 Heavy-wall tubing used in construction of induction coils Fig. 8.56 Illustration of method for joining small...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220241
EISBN: 978-1-62708-341-6
... on a forging-line induction coil to prevent the fields of adjacent inductors from affecting each other. The plate is fabricated of nonmagnetic stainless steel. Design of the current path involves splitting of the closed loop and provision of a larger circuit with annular slots, thus increasing the resistance...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220281
EISBN: 978-1-62708-341-6
..., it is then moved through the coil and pressed into the assembly to deform the plastic. Induction heating is preferred to resistance heating of the die because of its capability for rapid heating. Unlike resistance, it can provide the die with a high recovery heating rate for high-production applications. Typically...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220085
EISBN: 978-1-62708-341-6
... Heating , Vol 1, John F. Rider, Inc., New York, 1960 ( Ref 2 ) Fig. 6.27 Recommend clearance between coil ID and tube OD during induction welding of tubular products. From J. A. Redmond, Induction/Resistance Tube and Pipe Welding , Westinghouse Electric Corp., Baltimore ( Ref 18 ) Fig...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220143
EISBN: 978-1-62708-341-6
... Zinc 0.07 0.50 Zirconium 0.22 0.40 Fig. 7.5 Schematic coil-current-versus-time curve for a steel bar surface hardened by an induction heating method. The times t m and t p separate the three stages f, f/p, and p. From J. D. Verhoeven, H. L. Downing, and E. D. Gibson, Journal...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220047
EISBN: 978-1-62708-341-6
...Abstract Abstract Besides the induction coil and workpiece, the induction generator (source of ac power) is probably the most important component of an overall induction heating system. Such equipment is typically rated in terms of its frequency and maximum output power (in kilowatts...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.9781627083119
EISBN: 978-1-62708-311-9
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220253
EISBN: 978-1-62708-341-6
...; very hard, dimensionally stable; standard and special shapes; resists high temperatures Epoxy Fibre Glass FF91 (b) Coil-mounting supports; good electrically; also useful for soft soldering to about 230 °C (450 °F) Transite II (c) Work-table tops; heat resistant; avoid for coil supports...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050191
EISBN: 978-1-62708-311-9
... Fig. 10.14 Examples of surface-hardened gears using through surface hardening definition. (a) Transmission gear pinion. (b) Shaft/helical gear. (c) Pump gear. Courtesy of ERS Engineering, Inc. Source: Ref 5 Fig. 10.15 Dual-frequency contour, one coil. A single induction coil provides...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130417
EISBN: 978-1-62708-284-6
... effect on the heating profile of the workpiece. Source: Ref 19 , 42 Fig. 24 Heating profile on rotational workpiece with induction coil. Source: Ref 42 Fig. 25 Heating profile on rotational workpiece with flux concentrator. Source: Ref 42 Fig. 26 Gap-by-gap and tooth...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050293
EISBN: 978-1-62708-311-9
..., heat stations, capacitors, high-frequency output stages, induction coils, water systems, quench systems, and fixturing. References References 1. Haimbaugh R.E. , Induction Heat Treating Corp. , personal, 2001 2. Blackwood R. and Mueller E. , Installation and Control...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.pht2.t51440159
EISBN: 978-1-62708-262-4
... Vacuum tube 50 kHz to 10 MHz 1 kW to 500 kW 50–75 Shallow heating depth; localized heating; highest cost; impedance matches changing loads; lowest efficiency Source: Ref 4 Fig. 6 Induction hardening of a gear. The heating coils are surrounded by the spray quenching head. A thin...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220001
EISBN: 978-1-62708-341-6
...., the workpiece. These so-called eddy currents dissipate energy and bring about heating. The basic components of an induction heating system are an induction coil, an alternating-current (ac) power supply, and the workpiece itself. The coil, which may take different shapes depending on the required heating...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050281
EISBN: 978-1-62708-311-9
... Pressure Low flow Low and high temperature Filtering Quench quality Cooling water system Low pressure and flow: power supply, heat station, coil High temperature Resistivity Filtering Control system for quality Induction coil Ground fault detector if possible...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220315
EISBN: 978-1-62708-341-6
... Tube Welding Because a given induction coil can often be used only for a given part and heating application, induction heating is almost always selected for large production runs of a given product for which coil changes are not necessary. Such processes are best carried out on an automated basis...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050001
EISBN: 978-1-62708-311-9
... low-turn work coils. Around 1948, General Electric performed research on the optimum design for output transformers for radio-frequency (RF) induction heaters. They ran tests on both the size of the transformer (settling on 152 mm, or 6 in.) and the stepdown ratio (11:1 found to be most desirable...